Study on the Alkoxylation of Dihydromyrcene over Cation Exchange Resins

Abstract

Reaction of dihydromyrcene (DHM) alkoxylated with 2-methyl-1,3-propanediol catalyzed by resin catalysts was systematically researched. The conditions were optimized after the investigation of resin type, ratio of reactants, and temperature in a stirred tank reactor. Thermodynamic data ranging from 343.15 to 363.15 K were revised by UNIFAC group contribution method, evaluating the parameters as follows: Δr H 0 = −49.5 kJ·mol–1, Δr S 0 = −157.6 J·mol–1·K–1, and Δr G 0 = −2.5 kJ·mol–1. Kinetic equations derivated from the pseudohomogeneous (PH) model were applied for fitting the experimental data with the internal and external diffusion eliminated in this alkoxylation system. The agreement of the results suggested that the PH model can be used to describe the alkoxylation of DHM.

Kinetic Study on Esterification of Acetic Acid with Isopropyl Alcohol Catalyzed by Ion Exchange Resin

“…Kinetic equations eqs 18–20 are integrated by the method of Runge–Kutta–Fehlberg 14,20 with the experimental data. The computational procedure is to minimize the sum of residual squares (SRS) 21 between the experimental conversion of IPA and the calculated values, which is shown as follows…”

Molecule-electron-proton transfer in enzyme-photo-coupled catalytic system

“…Improving the contact probability between substrates and catalysts by accelerating the mixing of liquid-solid phase is a commonly used strategy to enhance the molecule transfer (Fig. 3(a)) [56,57]. In addition, the transfer of substrate molecules can also be enhanced by shortening the mass transfer distance of the substrate molecules to the surface of catalysts (Fig.…”

Thermodynamic and Kinetic Study on the Catalysis of Isobornyl Acetate by a Cation Exchange Resin an Intensified Fixed-Bed Reactor

“…Although the solid super acid is easy to separate after the catalytic reaction is completed, the regeneration and recycling of the catalyst is a problem that is difficult to solve in industrial applications. Based on the above problems, in recent years, cation exchange resins have been widely used due to their good chemical stability, easy separation and recovery, safety and pollution-free, high catalytic activity and selectivity [7][8][9][10][11][12].…”